1/*-
2 * Copyright (c) 2008 Christos Zoulas
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
15 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
16 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
17 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
18 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
19 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
20 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
21 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
22 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
23 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
24 * POSSIBILITY OF SUCH DAMAGE.
25 */
26
27#include "file.h"
28
29#ifndef lint
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30FILE_RCSID("@(#)$File: cdf_time.c,v 1.5 2009/02/03 20:27:51 christos Exp $")
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| 30FILE_RCSID("@(#)$File: cdf_time.c,v 1.6 2009/03/10 11:44:29 christos Exp $") |
31#endif
32
33#include <time.h>
34#ifdef TEST
35#include <err.h>
36#endif
37#include <string.h>
38
39#include "cdf.h"
40
41#define isleap(y) ((((y) % 4) == 0) && \
42 ((((y) % 100) != 0) || (((y) % 400) == 0)))
43
44static const int mdays[] = {
45 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31
46};
47
48/*
49 * Return the number of days between jan 01 1601 and jan 01 of year.
50 */
51static int
52cdf_getdays(int year)
53{
54 int days = 0;
55 int y;
56
57 for (y = CDF_BASE_YEAR; y < year; y++)
58 days += isleap(y) + 365;
59
60 return days;
61}
62
63/*
64 * Return the day within the month
65 */
66static int
67cdf_getday(int year, int days)
68{
69 size_t m;
70
71 for (m = 0; m < sizeof(mdays) / sizeof(mdays[0]); m++) {
72 int sub = mdays[m] + (m == 1 && isleap(year));
73 if (days < sub)
74 return days;
75 days -= sub;
76 }
77 return days;
78}
79
80/*
81 * Return the 0...11 month number.
82 */
83static int
84cdf_getmonth(int year, int days)
85{
86 size_t m;
87
88 for (m = 0; m < sizeof(mdays) / sizeof(mdays[0]); m++) {
89 days -= mdays[m];
90 if (m == 1 && isleap(year))
91 days--;
92 if (days <= 0)
93 return (int)m;
94 }
95 return (int)m;
96}
97
98int
99cdf_timestamp_to_timespec(struct timespec *ts, cdf_timestamp_t t)
100{
101 struct tm tm;
102#ifdef HAVE_STRUCT_TM_TM_ZONE
103 static char UTC[] = "UTC";
104#endif
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| 105 int rdays; |
106
107 /* Unit is 100's of nanoseconds */
108 ts->tv_nsec = (t % CDF_TIME_PREC) * 100;
109
110 t /= CDF_TIME_PREC;
111 tm.tm_sec = t % 60;
112 t /= 60;
113
114 tm.tm_min = t % 60;
115 t /= 60;
116
117 tm.tm_hour = t % 24;
118 t /= 24;
119
120 // XXX: Approx
121 tm.tm_year = CDF_BASE_YEAR + (t / 365);
122
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122 int rdays = cdf_getdays(tm.tm_year);
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| 123 rdays = cdf_getdays(tm.tm_year); |
124 t -= rdays;
125 tm.tm_mday = cdf_getday(tm.tm_year, t);
126 tm.tm_mon = cdf_getmonth(tm.tm_year, t);
127 tm.tm_wday = 0;
128 tm.tm_yday = 0;
129 tm.tm_isdst = 0;
130#ifdef HAVE_STRUCT_TM_TM_GMTOFF
131 tm.tm_gmtoff = 0;
132#endif
133#ifdef HAVE_STRUCT_TM_TM_ZONE
134 tm.tm_zone = UTC;
135#endif
136 tm.tm_year -= 1900;
137 ts->tv_sec = mktime(&tm);
138 if (ts->tv_sec == -1) {
139 errno = EINVAL;
140 return -1;
141 }
142 return 0;
143}
144
145int
146cdf_timespec_to_timestamp(cdf_timestamp_t *t, const struct timespec *ts)
147{
148 (void)&t;
149 (void)&ts;
150#ifdef notyet
151 struct tm tm;
152 if (gmtime_r(&ts->ts_sec, &tm) == NULL) {
153 errno = EINVAL;
154 return -1;
155 }
156 *t = (ts->ts_nsec / 100) * CDF_TIME_PREC;
157 *t = tm.tm_sec;
158 *t += tm.tm_min * 60;
159 *t += tm.tm_hour * 60 * 60;
160 *t += tm.tm_mday * 60 * 60 * 24;
161#endif
162 return 0;
163}
164
165
166#ifdef TEST
167int
168main(int argc, char *argv[])
169{
170 struct timespec ts;
171 static const cdf_timestamp_t tst = 0x01A5E403C2D59C00ULL;
172 static const char *ref = "Sat Apr 23 01:30:00 1977";
173 char *p, *q;
174
175 cdf_timestamp_to_timespec(&ts, tst);
176 p = ctime(&ts.tv_sec);
177 if ((q = strchr(p, '\n')) != NULL)
178 *q = '\0';
179 if (strcmp(ref, p) != 0)
180 errx(1, "Error date %s != %s\n", ref, p);
181 return 0;
182}
183#endif
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